MOSCOW REPORTS PAUSE ON MISSILES

Special to the New York Times

Published: March 3, 1982

BONN, March 2—
A high Soviet official said at a disarmament seminar today that the Soviet Union had not deployed any new SS-20 intermediate-range nuclear missiles in the western part of its territory since last November. His statement was dismissed as meaningless by a State Department official.

This exchange came today at a four-day conference on peace and disarmament that began Monday at the Evangelical Protestant Academy in Tutzing in the southern part of West Germany.

The Soviet official, Leonid M. Zamyatin, a member of the Central Committee of the Soviet Communist Party, said he had been authorized to deny a statement made in Washington Monday by the American Secretary of Defense, Caspar W. Weinberger that the Soviet Union had increased the tempo of SS-20 deployment.

According to Mr. Weinberger, the Russians had stepped up the deployment from one launcher in seven days to one in five days. However, the Secretary did not say where this was happening. 'Disinformation' Denounced

Mr. Zamyatin denounced the statement as ''disinformation of the public'' and said: ''In fact, the Soviet Union has not deployed a single SS-20 missile on its European territory since Leonid Brezhnev's negotiations in Bonn with Chancellor Helmut Schmidt.''

The reference was to the Soviet leader's visit to Bonn last November.Commenting on Mr. Zamyatin's remarks, Richard R. Burt, the State Department's Director of Politico-Military Affairs, who was also at the seminar, said there was no proof that there had been a halt in SS-20 deployment in the western part of the Soviet Union. But even if this was true, he said, the statement was meaningless because the SS-20's, which have three warheads each, can hit any target in Western Europe even if deployed on the Asian side of the Urals. American Official's Remarks

He told the seminar that the Soviet Union had deployed 280 SS-20's with a total of 840 warheads. He said also that Moscow was preparing to deploy 500 more warheads.

(The Soviet press agency Tass made no mention in its dispatch on the seminar of the Zamyatin remark about halting the SS-20 deployment west of the Urals, The Associated Press reported.)

American officials at the conference told reporters that the United States had no evidence of any halt in the deployment of SS-20's directed at Western Europe. In fact, one said, SS-20 site preparation ''continues at this time.''

At today's seminar, Mr. Zamyatin, who has often served as a spokesman for Mr. Brezhnev, reiterated the Soviet President's offer to reduce the number of SS-20's deployed in the western part of the Soviet Union if the United States dropped plans to deploy 572 new medium-range weapons in Western Europe. The United States has rejected this proposal.

President Reagan has said that the United States would be willing to drop its deployment plans if the Soviet Union agreed to dismantle comparable forces.

Also at today's seminar, Mr. Burt delivered a speech asserting that the United States had obtained evidence indicating that the Warsaw Pact possessed a familiarity with biological weapons that he said no Western country possessed. Both the United States and the Soviet Union have signed a convention banning such weapons.

Mr. Burt quoted several passages from what was described later as an East German military manual that indicated a considerable familiarity with the production and use of toxin weapons.